<template>
  <div class="app">
    <h3>我是App组件</h3>
    <Child/>
  </div>
</template>

<script>
import Child from  './components/Child.vue'
export default {
  name: "App",
  components: {Child},
}
</script>

<style>
  .app{
    background-color: gray;
    padding: 10px;
  }
</style>